It's is hilarious. The Baker City salt lick art contest made national news: http://www.npr.org/2012/12/22/167698817/the-joy-of-salt-licking-contest-turns-farm-animals-into-fine-artists
Unfortunately they didn't mention the provision in last year's contest that "all licks must be done by animals and they'll be tested for human saliva and DNA." Whit is a pretty good tongue-in-cheek promoter.
I've thought about the possibilities of sawing or sandblasting your block to establish form in advance of final finishing by the official lickers though. As far as I know no one has tried that yet.
